Semi-Persistent Scheduling for Multi-TRP Networks

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Solution Overview

Problem

Current wireless communication systems, particularly in 5G and LTE networks, face challenges in efficiently processing semi-persistent scheduling (SPS) transmissions activated by downlink control information (DCI) across multiple transmitter-receiver points (TRPs), which affects acknowledgement feedback and resource allocation, leading to suboptimal performance in multi-TRP scenarios.

Innovation Solution

The method involves detecting DCI on multiple control resource sets (CORESETs) to activate or release SPS configurations, determining codebook constructions for acknowledgement feedback, and providing feedback accordingly, allowing for separate or joint acknowledgement feedback mechanisms to manage SPS transmissions across different TRPs, thereby enhancing resource management and reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If SPS transmissions are activated by DCI in multi-TRP scenarios, then resource allocation efficiency is improved, but acknowledgement feedback complexity increases

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidacknowledgement feedback complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the acknowledgement feedback mechanism by introducing separate feedback processes for different TRPs. Each TRP can be assigned to different PUCCH groups, allowing independent feedback handling. This segmentation resolves the contradiction by maintaining efficient resource allocation through DCI-based SPS activation while managing feedback complexity through structured grouping and separate feedback paths for each TRP.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimension of organization by implementing PUCCH group IDs and associating them with specific TRPs. This dimensional approach allows the system to handle multiple SPS configurations from different TRPs by routing acknowledgements through different PUCCH groups, thereby resolving the feedback complexity issue while preserving resource allocation efficiency.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If multiple SPS configurations are supported for different TRPs, then system adaptability is improved, but determination complexity of DCI activation increases

Engineering Contradiction:

Improvesystem adaptabilityVSAvoiddetermination complexity of DCI activation

Core Design Contradiction:

Adaptability or versatilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies local quality by associating specific properties (PUCCH group IDs) with specific TRPs and SPS configurations. Each SPS configuration is locally tied to a particular TRP and PUCCH group, enabling the UE to determine which configuration is being activated by examining the DCI in the context of the specific TRP's associated group. This resolves the determination complexity while maintaining high system adaptability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements feedback mechanisms where the network can indicate which PUCCH group should be used for acknowledgement feedback in the DCI. This feedback approach allows the system to support multiple SPS configurations for different TRPs with high adaptability, while the UE can determine DCI activation clearly through the explicit feedback indicators provided in the control information.

Inventive Principle:

Principle #23Feedback

3Reliability

If separate PUCCH groups are used for different TRPs, then acknowledgement reliability is improved, but resource management complexity increases

Engineering Contradiction:

Improveacknowledgement reliabilityVSAvoidresource management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments resource management by introducing PUCCH group IDs that are associated with specific TRPs. Each PUCCH group manages resources independently, allowing reliable acknowledgement handling for each TRP while simplifying overall resource management through this structured segmentation. The UE can manage resources more easily by following the group-based organization rather than handling all TRPs uniformly.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent creates a universal framework where PUCCH groups serve multiple functions: they organize TRPs, manage SPS configurations, and handle acknowledgement feedback. This multi-functional approach improves acknowledgement reliability through structured separation while reducing resource management complexity by providing a unified methodology that applies across all TRPs and configurations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11350419B2Semi-persistent scheduling (SPS) for multi-DCI based multi-transmitter receiver point (TRP)

Publication Date: 2022.05.31 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide techniques for processing semi-persistent scheduling (SPS) transmissions activated with downlink control information (DCI) transmissions in a system with multiple transmitter receiver points (TRPs).